Years after he fought his way out of an inescapable prison, Ray Breslin has organized a new top-notch security force. But when one of his team members goes missing, Breslin must return to the hell he once escaped from.

A homeless veteran leaves his dying dog and best friend, Duke, on the doorstep of an animal clinic. The dedicated staff nurse Duke back to health, and then launch a campaign to locate the veteran and re-unite him with his best pal.